• Aleksander Augustyn, Tomasz Stołtny, Dominika Rokicka, Marta Wróbel, Jan Pająk, Krystian Werner, Karol Ochocki, Krzysztof Strojek, and Bogdan Koczy.
• District Hospital of Orthopaedics and Trauma Surgery in Piekary Śląskie, Bytomska St. 62, Piekary Śląskie, Poland.
• Medicine (Baltimore). 2022 Jan 28; 101 (4): e28475e28475.

RationaleResurfacing arthroplasty using the J&J DePuy ASR system was withdrawn from surgical treatment due to the necessity of frequent revision procedures after its application. There have been many studies concerning treatment of acetabular bone loss using different operating techniques. However, we felt that data of custom - made implant usage in such cases is highly insufficient, and there is lack of evidence on its application in treatment of loosening of the previous implant. The aim of the study was to evaluate the effectiveness of surgical treatment with a custom-made implant in a patient with extensive acetabular bone loss after aseptic loosening of the acetabular component of the J&J DePuy ASR surface prosthesis in the early period of observation.Patient ConcernsA 74-year-old patient was taken to the Orthopaedic Trauma Emergency Room due to increasing pain in the right hip for about 3 months. Nine years earlier he underwent resurfacing arthroplasty of the right hip using the J&J DePuy ASR method.DiagnosesThe imaging diagnostics (X-ray, computed tomography, ultrasound) revealed the presence of a pseudotumor and lysis around the acetabular implant, which caused a fracture in the acetabulum.InterventionsRevision arthroplasty of the right hip joint was performed with the removal of the ASR implant. During the procedure extensive bone defects were visualized, preventing the insertion of the revision acetabulum. After extensive plasticization of the defects with the use of allogeneic cancellous chips the "hanging hip" was left with the intention of making another attempt to insert the implant after the reconstitution of the acetabular bone. A computed tomography examination 2.5 years after the ASR removal revealed the lack of an adequate degree of bone remodeling for the planned implant. Arthroplasty using custom - made aMace Acetabular Revision System by Materialize was performed 3 years after the removal of ASR.OutcomesOptimal implant adherence to the bone base and full osseointegration with the pelvic bone bearing has been achieved. Significant improvement in clinical parameters has been noted, with no complications in the postoperative period.LessonsThe use of an individual custom-made implant in extensive acetabular bone loss after aseptic loosening of the acetabular component of the J&J DePuy ASR surface prosthesis in patients is an effective method of surgical treatment.Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.

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